Toy balloon



FIG. 1 is a front perspective view of a toy balloon illustrating my new design;

FIG. 2 is a front elevation view thereof, the back elevation view being identical in appearance;

FIG. 3 is a left side view thereof, the right view being identical in appearance;

FIG. 4 is a top plan view thereof; and,

FIG. 5 is a bottom plan view thereof. 

The ornamental design for a toy balloon, as shown and described. 